The pitfalls of a cheap electric bike
Getting your hands on a premium model at the price of an entry-level model... that's the appeal of a used electric bike. Unfortunately, buying a used e-bike comes with several pitfalls. We review the seven most common mistakes so that you don't buy a pig in a poke the next time you make a purchase.
Written by: Jos Mans | February 23, 2026 | Reading time: 6minutes
Learn more about the author: Dieter Devriendt
Journalist Dieter writes passionately and expertly about the world of cycling. Under the motto "we write – we ride," he gladly shares his experience with cyclists to make their lives easier, both on and off the saddle.
Key findings
- Buying a used electric bike requires a critical eye that goes beyond aesthetics.
- Check the fundamentals before purchasing: motor, battery, and frame.
A growing market, but a complex product
Buying a used electric bike is a smart choice for your wallet and the environment. The e-bike market is growing rapidly, which means there is an abundance of "almost new" bikes available. This means you can purchase a high-end model from a major brand for the price of an entry-level model in a store.
However, an e-bike is a more complex product than a traditional city bike. Whereas with a conventional bike, you only need to check the chain and tires, an electric bike involves electronics, software, and an expensive power source. The risks are therefore greater: a hidden defect in the motor or a worn-out battery can turn what appears to be a good deal into a costly purchase.
In this article, we take a detailed look at the seven most common mistakes people make when buying a used electric bike. This will ensure you are fully informed when searching for that rare gem on the e-bike market.
1. Underestimating the condition of the battery
The biggest mistake is to assume that the battery will last a long time. The battery is the heart of the electric bike and also its most expensive component. A new battery can easily cost between €400 and €800. Many buyers are reassured by a "full battery" displayed at 100% on the screen. However, this only means that it is charged at that precise moment, not that the internal cells are in good condition.
Over time, lithium-ion cells lose their capacity, especially if the bike has been stored for a long time with an empty battery in a cold place.
To avoid this error:
- Ask about the age of the battery (its average lifespan is 4 to 6 years).
- For a bike that is more than 5 years old, you may need to plan for a quick replacement.
- Ask for the "State of Health" (SOH). A reputable seller can provide a report prepared by a professional.
- Find out about storage conditions in winter. A battery stored at room temperature will last much longer than one exposed to freezing temperatures.
2. Not doing (or doing too briefly) a trial run
An e-bike may look perfect, but it may have flaws that only become apparent after a few miles. A two-minute test ride on the street is not enough. Problems such as a noisy motor, irregular assistance on hills, or instability at high speeds only become apparent when the bike is really put to the test.
Furthermore, ergonomics (is the bike suited to your body type?) cannot be assessed over a distance of 300 meters.
Take the time to conduct a thorough test:
- Test all levels of assistance, from Eco to Turbo/Boost mode.
- Look for a hill to check the engine's response under load.
- On a flat section, briefly let go of the handlebars (with caution) to check the stability and alignment of the frame.
- Pay attention to engine noises: a mid-engine car may be audible, but it should not squeak or rattle.
3. Do not request a diagnostic report
For a modern car, it is normal to read the data from the on-board system. However, this step is often overlooked for e-bikes. Buying solely on the basis of the seller's statements is risky. Without a diagnostic report, you are unaware of any internal error codes, the number of full charge cycles, or software issues.
Request an official report from an authorized dealer. This report will indicate:
- The exact remaining battery capacity
- The number of kilometers traveled by mode of assistance
- Possible engine overheating
If no report is available, suggest going together to a repair shop for a quick check-up. The $30 to $50 it costs is an excellent investment.
4. Ignoring mechanical wear
Attention is often focused on the motor and battery, but an e-bike is still a bike. However, the strain on the chain and sprockets is greater due to the electric assistance.
A broken chain, worn brake pads, or tires can lead to additional costs. A complete transmission overhaul can quickly cost between $200 and $300.
Check:
- The condition of the chain (rust or insufficient tension = bad sign)
- Brakes (spongy feeling for hydraulic brakes or metal-on-metal noise = warning sign)
- tires dry cracks between the grooves)
Since e-bikes are heavier, tires good condition are essential for safety.
5. Choosing the wrong engine position
Not all used e-bikes are suitable for all uses. Many buyers focus on price and overlook the type of motor.
General rules:
- Central motor: ideal for versatile use and hilly terrain thanks to its good balance.
- Front motor: often cheaper and quieter, but gives a feeling of forward traction. Less suitable for slippery roads or steep slopes.
- Rear motor: very quiet and powerful, often combined with a derailleur. Ideal for sports use, but less practical in the event of a flat tire.
Choose based on your usage profile, not just price.
6. Misinterpreting mileage
Low mileage always seems preferable, but this is not always the case for an electric bike.
A bike that has only traveled 200 km in three years may seem like new. However, a battery that has not been used for three years without recharging may be deeply discharged and chemically damaged. Conversely, a bike with 10,000 km on it may be in excellent condition if it has been properly maintained.
Analyze the age/mileage ratio:
- Regular use (for example, 1,500 km per year) is often healthier than long periods of inactivity.
- After 15,000 km, check whether the engine bearings or transmission have already been replaced.
7. Not verifying the origin and documents
The theft of electric bikes has become a real black market. Buying a stolen bike exposes you to prosecution for handling stolen goods, and the bike may be seized without compensation. A price that is "too good to be true" is often suspicious.
Always check:
- The frame number via online registries
- The original invoice (and any remaining warranty on the frame or motor)
- The two original keys
A bicycle sold without a charger is also a red flag and must be justified in a credible manner.
Conclusion
Buying a used electric bike requires careful consideration that goes far beyond its outward appearance. The seven mistakes described above can lead to significant unexpected costs.
By systematically testing the battery, performing a thorough inspection, and checking the maintenance history, you significantly reduce the risk of unpleasant surprises.
Remember: a good used e-bike is an investment in years of cycling enjoyment, provided that the fundamentals (motor, battery, and frame) are in perfect condition.
One of the major players in this segment is Decathlon.The B’Twin Elops 900 E model often retails for around €1,000 and offers a surprisingly complete urban experience. Although it is equipped with a rear wheel motor (less expensive to produce), the electronic integration is well done. The motor provides sufficient assistance on flat terrain and the battery is a reliable type, maintained directly by Decathlon.
Another interesting option is the Rockrider E-ST 100, also available at Decathlon. This MTB is designed for recreational rides on unpaved trails. Its range is more limited than on more expensive models, but the mechanical disc brakes are easy to maintain. Often priced at less than €1,000, it's a safe entry point into the world of electric bikes—as long as you don't expect extreme performance.
FAQ
What should I pay most attention to when buying a used e-bike?
The condition and age of the battery are crucial, as it is the most expensive component and the most susceptible to wear and tear.
Is a short test sufficient to detect problems?
No. Only a longer test drive, in different assistance modes, allows for a proper assessment of the engine, road handling, and ergonomics.
Why is a diagnostic report important?
A diagnostic report provides objective data on battery health, error codes, and wear and tear, and avoids relying solely on the seller's statements.